Honor system coin box for coffee machine



FIG. 1 is a front perspective view of an honor system coin box for coffee machine showing my new design;

FIG. 2 is a rear elevational perspective view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof;

The right side of the honor system coin box for coffee machine, is a substantial mirror image of the left side. 

The ornamental design for an honor system coin box for coffee machine, substantially as shown and described. 